Today I examined a very interesting H. Holland single barrel muzzle loading percussion shotgun. Barrel breech forward of the percussion lock is hexagonal tapering to round about 6" up the tube, and the breech itself forward of the lock face on the right hand side has an odd-looking sloped contour that almost reminds one of the treatment of a 30-40 Krag rifle - asymmetrical sloped face to meet and just protrude slightly over the stock at that point. Could this be a flintlock to percussion conversion? Barrel address is H. Holland maker 96 New Bond St. London. Barrel is about 34" long, straight grip with full steel buttplate and what appears to be the original ramrod with screw worm fitting on breech end and original brass tip replace with a spent Winchester .45-70 casing (Nice colonial touch!). The barrel appears to have been blued; no damascus pattern evident. The combination of features above make it an intriguing gun. Anyone have any ideas as to what I looked at? KBM